Throttle-valve.



G. G. KINDIG & J. L. DXTEB.. THROTTLE VALVE.

APPLICATION FILED 0UT.2, 1903. v 924,080, Patented June 8, 1909.

witnuau co.. WASHINGTON. D. c4

1H: NoRR'ls PETER;

enfin UNIT@ STATE ,ASIEN FIQ.

CHARLES C. KINDIG AND JOHN L, DEXTER, OF WEST BLOCTON, ALABAMA.

THROTTLE-VALVE Specification of Letters Patent.

Patented June 8, 1909.

Application filed October 2, 1908. Serial No. 455,843.

To all whom 'it may concern:

Be it known that we, CHARLES C. KINDIG and JOHN L. DEXTER., citizens of the United States, and residents of West Blocton, in the county of Bibb and State of Alabama, have invented certain new and useful Improvements in Throttle-Valves, of Which the following is a specification.

The invention relates to improvements in throttle-valve mechanism for steam-engines, more particularly to the mechanism employed in locomotives. When it is desired to pack the throttle-rod of the valve in ordinary use it is necessary to withdraw or bank the iire and allow all the steam to escape from the boiler.

The object of the present invention is to ,provide means whereby the throttle-rod can be packed without withdrawing or banking the fire and while there is a full pressure of steam in the boiler.

The invention consists in the novel construction, combination and arrangement of parts such as will be hereinafter fully described, pointed out in the appended claims and illustrated in the accompanying drawmg.

The figure of they drawing is a sectional view, broken away' in parts, of mechanism embodying` the invention.

In the boiler-head 1, which is of the usual construction, is the opening 2, in line with which is the stuling-boX 3 secured to the outer face of the boiler-head by the bolts 4. In the stuffing-box is the packing 5 compressed therein by the gland 6. To the inner face of the boiler-head is secured the conical casing 7 by the bolts 3 over the opening 2. In the inner end ofthe casing is the bearing 8 in line with the opening 2 and the stuilingboX. Adjacent to this bearing the interior of the casing is screw-threaded, as at 9. Passing through the stuiiing-box, the opening 2, and the bearing 8 is the throttle-rod 10, on which is screw-threaded, as at 11, the sleeve 12 also passing through the stuffingboX and opening 2. The inner end of the sleeve is screw-threaded, as at 13, to engage the screw-threaded part 9 of the conical casing. In the outer end of the sleeve are the holes 14 to receive the lugs of a turning wrench. Pivoted to the outer end of the throttle-rod 1() is the usual operating lever l5 hinged by the link 16 to the boiler-head. The sleeve 12 practically forms part of the throttle-rod 10, having a limited longitudinal movement thereon. vWhen the mechanism is in its normal condition so that the throttlerod can be operated to move its valve, the sleeve 12 is disengaged from the conical casing 7 as indicated by dotted lines in the drawing. The packing 5 compressed in the stuiing-box by the gland around the sleeve prevents the escape through the opening 2 of any steam entering the conical casing through the bearing 8. The screw-threaded engagement 11 of the sleeve and throttle-rod prevents the escape of any steam that may enter between these two members from the casing.

When it is desired to repack the stuflingbox when there is a full head of steam in the boiler, iirst the throttle-rod is moved inwardly to close its valve. This moves the sleeve 12 so that its inner screw-threaded end 13 is in a position to engage the screwthreaded part 9 of the casing. By means of a wrench inserted in the holes 14 in the sleeve the latter is turned on the throttlerod and through the screw-threaded engagement 11 between the two the sleeve is moved inwardly on the rod. The inward turning movement of the sleeve causes its screw-threaded inner end 13 to be turned into the screw-threaded part 9 of the casing as shown by full lines inthe drawings. When this is done the throttle-rod is not only held against movement, but the bearing 8 is closed so that the steam cannot enter the conical casing from the boiler, neither can it ass through the opening 2 in the boilerhead. After this adjustment has been made the gland can be removed from the stuiiing-box and the packing renewed. After the gland has been replaced the mechanism is adjusted to its normal position by turning the sleeve on the throttle-rod to the position shown by dotted lines in the drawing.

Having thus described our invention, what We claim and desire to secure by Letters Patent is,

1. In a throttle-valve mechanism, a boilerhead provided with an opening, a casing secured to the inner side of said boiler-head over said opening having at its inner end a bearing in line with said opening screwthreaded adjacent to said bearing, a throttlerod longitudinally movable in said opening and bearing, and a sleeve screw-threaded on said throttle-rod extending through said opening and screw-threaded on its inner end to engage the screw-threaded part of the casing adjacent to the bearing to close the latter around the throttle-rod.

2. In a throttle-valve mechanism, a boilerhead provided With an opening, a stufling* boX secured to the outer side of said boilerllead over said opening7 a casing secured to the inner side of said boilerellead over said opening having at its inner end a bearing in line With said opening and stuflng-box and screw-threaded adjacent to said bearing, a throttle-rod longitudinally movable in said o ening, stuing-box and bearing, and a s eeve screw-threaded on said throttle-rod extending tliroufh said opening and Stuflingbox and screw-t lreaded at its inner end to engage the screw-threaded part of the casing adjacent to the bearing to close the latter around the throttle-rod.

Injtestiinony whereof We hereunto allix our Signatures in the presence of, two Witnesses.

CHAS, C. KINDIG. JOHN L. DEXTER.

Witnesses W7. H. .ViziGH'i, JESSE WRIGHT. 

